Akashic Guitar effects circuit lookup
BASSCLN GAINCLN VOLDIRT VOLGAINMIDTREB

1590BB · 7 knobs

Scientific Guitarist

Torivor PreampA Dual Channel LM386 Amp in a Box

Controls
Bass · Cln Gain · Cln Vol · Dirt Vol · Gain · Mid · Treb
Price
see vendor

From the vendor

I generally don't do projects that fall in the boost/OD/dirt category. Part of that is because I'm a bit of an addict and have a bunch already. The other part is that there are so many of them. Everyone and their dog has “designed” a dirt pedal. They also aren't particularly challenging from a technical standpoint, so I tend to focus on other types of projects. However, one of my favorite drives is an LM386-based unit, but the tone control is one of those kind of lame, single-knob, adjustable-cutoff frequency RC filter types. The dirt is great, but the tone shaping is somewhat lacking. I decided that I wanted to do my own take on an LM386 circuit, including a full tone stack and the ability to do both clean and dirty tones with it.

Schematic

The schematic is in the vendor's build document, page 1. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 58 rows

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RefValueNormalizedTypeNotes
Resistors 10
R11M1M
R2100k100k
R31k81.8k
R44k74.7k
R5100k100k
R61k81.8k
R710k10k
R10150R150
R111M1M
R12100R100
Capacitors 12
C1100n100n
C247u47u
C32n22.2n
C4470n470n
C51u1u
C647u47u
C7100n100n
C81u1u
C910u10u
C104n74.7n
C1147u47u
C12100u100u
Diodes 1
D11N400x, 1N58171N400X / 1N5817
Transistors 4
Q12N54572N5457
Q22N54572N5457
Q3MMBFJ201MMBFJ201
Q4MMBFJ201MMBFJ201
ICs 1
IC1LM386LM386
Potentiometers 7
BASS25kBB25k
CLN_GAIN1kCC1k
CLN_VOL100kAA100k
DIRT_VOL100kAA100k
GAIN100kAA100k
MID2kBB2k
TREB25kBB25k
Trimmers 4
BIAS1100k100kTrimmer
BIAS2100k100kTrimmer
C_TRIM100k100kTrimmer
RLEDTrimmer
Switches 2
SWLSP10LSP10
VOICESPDTSPDT
LEDs 2
D2LEDLED
LEDLSP10LSP10
Other 15
+9VLSP10LSP10
CHANLSP10LSP10
CHAN_A1LSP10LSP10
CHAN_A2LSP10LSP10
CHAN_A3LSP10LSP10
CHAN_B1LSP10LSP10
CHAN_B3LSP10LSP10
CHAN_C1LSP10LSP10
CHAN_C2LSP10LSP10
CHAN_C3LSP10LSP10
GNDLSP10LSP10
GND_INLSP10LSP10
GND_OUTLSP10LSP10
INLSP10LSP10
OUTLSP10LSP10